I've read some of the clinger mayflies transform from nymph to dun as they are transiting up the water column. Hafele's and Hughes' book didn't specify which clinger nymphs did this as they clumped the clinger nymph family together. Does the PMD emerge the nymphal shuck at the surface of the water or part way up the water column. I'm tying PMD emergers/soft hackles and would like to know as to whether to add partially formed wings to the emergers or not. I'm working on next year's trip to the Firehole in June. This year comparaduns fished slightly sunken (no floatant with me) produced fish. I'd like to fish a comparadun with an emerger/soft hackle trailer next time.